[jsankey]

The JetBrains suite of IDEs, all built on the same platform, support these and much more (Java, Python, Ruby, Scala, ...). With the exception of AppCode (for iOS) you can also get them all in the main release IDEA with relevant plugins.

[evv]

JetBrains is nice, but we try to avoid proprietary tools when we can.

[marcofiset]

Yeah, the not invented here syndrome.

[evv]

Exactly right. It was not invented here, it began at Github